526 APPENDIX. 



when they would again repeat their voluntaiy evolutions 

 They did not, however, always rise to the surface. The 

 journey was sometimes performed about midwater. They 

 are, when alive, a most beautiful coloured species, variegated 

 not unlike Urothoe elegans, and rivalling that animal in bright- 

 ness of tints. I took one, however, that was all over a most 

 brilliant red. I have been told that this species has never 

 been found outside the Medusa. However this may be, all 

 mine were. And what appears to be more extraordinary is, 

 that, comparatively speaking, we have had no Medusa here 

 this season (1865). During the months of July, August, and 

 September I have seen them, generally, by hundreds and 

 thousands. All that I have this year observed have been 

 three." Mr. Edward also informs us that he has seen speci- 

 mens of these crustaceans thrown on the shore in extraordinary 

 large quantities. After a storm one night, he saw them form- 

 ing a band an inch and a half broad to an inch and a half 

 deep, for thirty yards along the beach. 



